Microphone : Φ 12.7 mm (1/2) test condenser microphone
Frequency weighting : A, C, and Lin (Linear)
Range : 25 dB to 130dB (A)
Range control : Manual, three gears, linear range > 60 dB
Testing Range : 30 dB to 90 dB (dynamic scale display 10 to 100) 50 dB to 110 dB (dynamic scale display 30 to 120) 70 dB to 130 dB (dynamic scale display 50 to 140)